论文标题
在工作流程上，有效地计算紧砂石的渗透性
On a workflow for efficient computation of the permeability of tight sandstones
论文作者
论文摘要
该论文介绍了一个工作流程，用于对通常以低尺度孔隙率特征的紧密储层中的单相流量进行快速孔隙尺度模拟。多尺寸孔隙率意味着计算结构域除了纯流体体素外，还含有多孔体素（未解决的孔隙率）。在这种情况下，Stokes-Brinkman方程控制流动，而Darcy术语需要考虑多孔体素的流量。作为我们工作流程的中心部分，提出了用于Stokes和Stokes-Brinkman方程的强大而有效的求解器。分别针对低孔隙率二进制图像和多类图像定制求解器。工作流程的另一个重要组成部分是一个预处理模块，用于将图像分类有关多尺度孔隙空间的连接性。特别是，研究了没有纯流体渗透路径的图像，研究了Stokes-Brinkman问题的近似值，即Darcy问题。彻底的计算实验证明了工作流程的效率和鲁棒性，以模拟紧密储层的图像。描述使用过的CT图像的原始文件作为补充材料，使其他研究人员能够使用它们。
The paper presents a workflow for fast pore-scale simulation of single-phase flow in tight reservoirs typically characterized by low, multiscale porosity. Multiscale porosity implies that the computational domain contains porous voxels (unresolved porosity) in addition to pure fluid voxels. In this case, the Stokes-Brinkman equations govern the flow, with the Darcy term needed to account for the flow in the porous voxels. As the central part of our workflow, robust and efficient solvers for Stokes and Stokes-Brinkman equations are presented. The solvers are customized for low-porosity binary and multiclass images, respectively. Another essential component of the workflow is a preprocessing module for classifying images with respect to the connectivity of the multiscale pore space. Particularly, an approximation of the Stokes-Brinkman problem, namely, the Darcy problem, is investigated for the images that do not have pure fluid percolation paths. Thorough computational experiments demonstrate efficiency and robustness of the workflow for simulations on images from tight reservoirs. Raw files describing the used CT images are provided as supplementary materials to enable other researchers to use them.
